.icon-weixin{
  background: transparent url("../images/icons/weixin-icon.png") no-repeat center center;
}
.icon-weibo-sina{
  background: transparent url("../images/icons/weibo-sina-icon.png") no-repeat center center;
}
.icon-message{
  background: transparent url("../images/icons/message-icon.png") no-repeat center center;
}
.icon-qq{
  background: transparent url("../images/icons/qq-icon.png") no-repeat center center;
}